Cement self-tapping screw integrated nail

Abstract

The utility model relates to the technical field of screws, and discloses a cement self-tapping screw integrated nail which comprises a rod body, a protruding part is arranged at the lower end of the rod body, wide threads are arranged on the outer side of the rod body, and a first notch is formed in the outer side of the lower portion of the wide threads. According to the cement self-tapping screw integrated nail, the reflecting plate, the wide threads and the fine threads are arranged, a larger contact surface area can be provided when the screw is installed, the screw is made to be more difficult to loosen under vibration or repeated loads, the wide threads are matched with the fine threads, loads are distributed more evenly, the stress concentration condition is reduced, and the service life of the screw is prolonged. The first notches with the large slotting angle are formed, when the screw is drilled into a wall, the first notches are filled with wall materials, an additional friction surface can be formed at the threaded connection position, the anti-loosening performance is improved, connection is more stable and reliable, the number of the first notches is large, the area of the tangent plane of each notch is large, and the larger friction surface is provided; and the fastening effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a cement self-tapping screw integrated nail. Background Art

[0002] Cement self-tapping screws are a simple threaded connection, usually consisting of two parts: a screw part and a pointed cone-shaped integrated nail part. They are often used to fix and connect materials such as wood, metal, plastic or cement to a cement base, such as in construction, furniture making and decoration.

[0003] China Utility Model Patent Publication Number: CN 218000099 U, discloses: a self-tapping screw with integrated thread-cut tail and washer, wherein the self-tapping screw with integrated thread-cut tail and washer can adjust the rotation direction of the nut so that the screw body moves downward inside the internal thread, and the relative sleeve moves upward on the outer wall of the screw body. At this time, the plug block and the slot can be aligned with each other, and the connecting ring can be positioned by the plug block and the slot to prevent the position of the washer from being offset, and the connecting ring is pressed by the nut, and the telescopic spring is pressed by the connecting ring to shrink the telescopic spring, and the connecting ring is gradually immersed in the interior of the connecting groove. At this time, the staff can slow down the speed of rotating the nut, and wait for the connecting ring to be completely immersed in the interior of the connecting groove. At this time, the telescopic spring has been compressed to the most contracted state, and the rotation of the nut is stopped to prevent the phenomenon of slipping teeth, and the degree of rotation of the nut is controlled by the connecting ring and the telescopic spring to prevent damage to the connected sleeve. The structure realizes the control of the degree of rotation of the nut, prevents slipping teeth and prevents damage to the connecting piece at the same time, but the self-tapping screw with integrated thread-cut tail and washer has a relatively complex structure, poor fastening effect with the wall after installation, and poor tensile effect of the screw. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a cement self-tapping screw integrated nail, which can effectively solve the problems in the prior art.

[0005] The technical solution adopted by the utility model is: a cement self-tapping screw integrated nail, including a rod body, a protrusion is arranged at the lower end of the rod body, a wide thread is arranged on the outer side of the rod body, a first notch is opened on the outer side of the lower part of the wide thread, a fine thread is arranged on the outer side of the rod body, a second notch is opened on the outer side of the lower part of the fine thread, a connecting part is arranged on the upper end of the rod body, a gasket is arranged on the upper end of the connecting part, a ring tooth is arranged on the lower end of the gasket, and a rod head is arranged on the upper end of the gasket.

[0006] Preferably, both the wide thread and the fine thread are in a spiral structure, and the wide thread and the fine thread are arranged alternately.

[0007] Through the above technical solution, wide threads and fine threads are set, which can provide a larger contact surface area when the screw is installed, making it more difficult for the screw to loosen under vibration or repeated loads.

[0008] Preferably, the difference between the major diameter and the minor diameter of the wide thread is three times the difference between the major diameter and the minor diameter of the fine thread.

[0009] Through the above technical solution, wide threads and fine threads are matched to distribute the load more evenly, reduce stress concentration, and improve the fatigue resistance of the screws.

[0010] Preferably, the cross section of the notch 1 is in a "V"-shaped structure, and the angle between the two cut surfaces in the notch 1 is 120° to 150°.

[0011] Through the above technical solution, a slot 1 with a larger slotting angle is provided. When the screw is drilled into the wall, the slot 1 is filled with wall material, which can form an additional friction surface at the threaded connection, increase the anti-loosening performance, and make the connection more stable and reliable.

[0012] Preferably, the angle between the intersection line of the two cross-sections in any one of the notches 1 and the central axis of the shaft is 8° to 10°, and the angle between two adjacent notches 1 is 60°.

[0013] Through the above technical solution, the intersection line of the two cut surfaces in the notch 1 (i.e., the bottom of the groove) is inclined, and a notch 1 is opened every °. The number of notches 1 is large, and the area of ​​a cut surface of the notch is large, providing a larger friction surface and improving the fastening effect.

[0014] Preferably, the second notch and the adjacent first notch are located on the same straight line, and the protruding portion and the connecting portion are both truncated cone-shaped structures.

[0015] Through the above technical solution, the second notch cooperates with the first notch to improve the fastening effect.

[0016] Preferably, the cross section of the rod head is a regular hexagonal structure, the ring teeth are radially distributed at the lower end of the gasket, the vertical section of the ring teeth is a triangular structure and the angle of the right inner angle of the triangle is greater than the angle of the left inner angle of the triangle.

[0017] Through the above technical solution, a ring tooth is set. When the screw is locked on the wall in a clockwise thread, the ring tooth is in tight contact with the wall surface. When the screw tends to loosen counterclockwise after being subjected to external force, the ring tooth bites the wall surface to provide an anti-return function.

[0018] Compared with the prior art, the utility model provides a cement self-tapping screw integrated nail, which has the following beneficial effects:

[0019] 1. The cement self-tapping screw has wide and fine threads, which can provide a larger contact surface area when the screw is installed, making it more difficult for the screw to loosen under vibration or repeated loads. The wide and fine threads are matched to distribute the load more evenly, reduce stress concentration, and improve the fatigue resistance of the screw;

[0020] 2. The cement self-tapping screw has a notch 1 with a larger slotting angle. When the screw is drilled into the wall, the notch 1 is filled with wall materials, which can form an additional friction surface at the threaded connection, increase the anti-loosening performance, and make the connection more stable and reliable. The intersection line of the two cut surfaces in the notch 1 (i.e., the bottom of the groove) is inclined, and a notch 1 is opened every 60°. The number of notches 1 is large, and the area of ​​a cut surface of the notch is large, providing a larger friction surface and improving the fastening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0024] Figure 4 This is an enlarged structural diagram of the wide thread and the missing groove of the utility model;

[0025] Figure 5 It is a schematic diagram of the enlarged structure of the gasket and the ring gear of the utility model.

[0026] Among them: 1. Rod body; 2. Protruding part; 3. Wide thread; 4. Slot 1; 5. Fine thread; 6. Slot 2; 7. Connecting part; 8. Gasket; 9. Ring teeth; 10. Rod head. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1: Figure 1-5As shown, the utility model provides a cement self-tapping screw integrated nail, including a rod body 1, a protrusion 2 is provided at the lower end of the rod body 1, a wide thread 3 is provided on the outer side of the rod body 1, a notch 4 is provided on the outer side of the lower part of the wide thread 3, a fine thread 5 is provided on the outer side of the rod body 1, a notch 6 is provided on the outer side of the lower part of the fine thread 5, a connecting part 7 is provided on the upper end of the rod body 1, a gasket 8 is provided on the upper end of the connecting part 7, a ring tooth 9 is provided on the lower end of the gasket 8, and a rod head 10 is provided on the upper end of the gasket 8.

[0029] Specifically, both the wide thread 3 and the fine thread 5 are in a spiral structure, and the wide thread 3 and the fine thread 5 are arranged alternately. The advantage is that the wide thread 3 and the fine thread 5 can provide a larger contact surface area when the screw is installed, making the screw more difficult to loosen under vibration or repeated load.

[0030] Specifically, the difference between the major diameter and the minor diameter of the wide thread 3 is three times the difference between the major diameter and the minor diameter of the fine thread 5. The advantage is that the wide thread 3 cooperates with the fine thread 5 to distribute the load more evenly, reduce stress concentration, and improve the fatigue resistance of the screw.

[0031] Specifically, the cross section of the notch 4 is in a "V" shape, and the angle between the two cut surfaces in the notch 4 is 120° to 150°. The advantage is that when the notch 4 with a larger slotting angle is set, the notch 4 is filled with wall materials when the screw is drilled into the wall, and an additional friction surface can be formed at the threaded connection, thereby increasing the anti-loosening performance and making the connection more stable and reliable.

[0032] Embodiment 2: Figure 2-5 As shown, as an improvement to the previous embodiment.

[0033] Specifically, the angle between the intersection line of the two sections in any notch 4 and the central axis of the shaft 1 is 8° to 10°, and the angle between two adjacent notches 4 is 60°. The advantage is that the intersection line of the two sections in the notch 4 (i.e., the bottom of the groove) is inclined, a notch 4 is provided every 60°, the number of notches 4 is large, the section area of ​​the notch 4 is large, a larger friction surface is provided, and the tightening effect is improved.

[0034] Specifically, the second notch 6 and the adjacent first notch 4 are located on the same straight line, and the protrusion 2 and the connecting portion 7 are both truncated cone-shaped structures. The advantage is that the second notch 6 and the first notch 4 cooperate to improve the fastening effect.

[0035] Specifically, the cross section of the rod head 10 is a regular hexagonal structure, the ring teeth 9 are radially distributed at the lower end of the gasket 8, and the vertical section of the ring teeth 9 is a triangular structure, and the angle of the right inner angle of the triangle is greater than the angle of the left inner angle of the triangle. The advantage is that when the ring teeth 9 are set, when the screw is screwed on the wall in a clockwise manner, the ring teeth 9 are in close contact with the wall surface, and when the screw is subjected to external force and tends to loosen counterclockwise, the ring teeth 9 bite the wall surface to provide an anti-return function.

[0036] Working principle: During installation, use an electric wrench or other tools to connect the hexagonal rod head 10 to lock the screw thread on the wall. The wide thread 3 and the fine thread 5 provide a larger contact surface area when the screw is installed, making it more difficult for the screw to loosen under vibration or repeated loads. The wide thread 3 and the fine thread 5 cooperate to distribute the load more evenly, reduce stress concentration, and improve the fatigue resistance of the screw. A slot 4 with a larger slotting angle is set. When the screw is drilled into the wall, the slot 4 is filled with wall material, which can be used on the thread. An additional friction surface is formed at the connection to increase the anti-loosening performance and make the connection more stable and reliable. The intersection line of the two cross-sections in the notch 4 (i.e., the bottom of the groove) is inclined, and a notch 4 is opened every 60°. The number of notches 4 is large, and the cross-section area of ​​the notch 4 is large, providing a larger friction surface to improve the fastening effect. When the screw is locked on the wall clockwise, the ring teeth 9 are in close contact with the wall surface. When the screw tends to loosen counterclockwise after being subjected to external force, the ring teeth 9 bite the wall surface to provide an anti-return function.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cement self-tapping screw integrated nail, comprising a shaft (1), characterized in that: The lower end of the rod body (1) is provided with a protrusion (2), the outer side of the rod body (1) is provided with a wide thread (3), the outer side of the lower part of the wide thread (3) is provided with a first notch (4), the outer side of the rod body (1) is provided with a fine thread (5), the outer side of the lower part of the fine thread (5) is provided with a second notch (6), the upper end of the rod body (1) is provided with a connecting portion (7), the upper end of the connecting portion (7) is provided with a gasket (8), the lower end of the gasket (8) is provided with a ring tooth (9), and the upper end of the gasket (8) is provided with a rod head (10).

2. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The wide threads (3) and the fine threads (5) are both in a spiral structure, and the wide threads (3) and the fine threads (5) are arranged in a staggered manner.

3. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The difference between the major diameter and the minor diameter of the wide thread (3) is three times the difference between the major diameter and the minor diameter of the fine thread (5).

4. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The cross section of the notch 1 (4) is in a "V" shape, and the included angle between the two cut surfaces in the notch 1 (4) is 120° to 150°.

5. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The angle between the intersection line of the two cut surfaces in any one of the notches (4) and the central axis of the shaft (1) is 8° to 10°, and the angle between two adjacent notches (4) is 60°.

6. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The second notch (6) and the adjacent first notch (4) are located on the same straight line, and the protruding portion (2) and the connecting portion (7) are both truncated cone-shaped structures.

7. The cement self-tapping screw integrated nail according to claim 1, characterized in that: The cross section of the rod head (10) is a regular hexagonal structure, the ring teeth (9) are radially distributed at the lower end of the gasket (8), and the vertical section of the ring teeth (9) is a triangular structure, and the angle of the right inner angle of the triangle is greater than the angle of the left inner angle of the triangle.

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